20855741 has 4 divisors (see below), whose sum is σ = 20916192. Its totient is φ = 20795292.

The previous prime is 20855701. The next prime is 20855743. The reversal of 20855741 is 14755802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20855741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20855698 and 20855707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20855743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29705 + ... + 30398.

It is an arithmetic number, because the mean of its divisors is an integer number (5229048).

Almost surely, 2^20855741 is an apocalyptic number.

It is an amenable number.

20855741 is a deficient number, since it is larger than the sum of its proper divisors (60451).

20855741 is an equidigital number, since it uses as much as digits as its factorization.

20855741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60450.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 20855741 is about 4566.8086230978. The cubic root of 20855741 is about 275.2592200405.

The spelling of 20855741 in words is "twenty million, eight hundred fifty-five thousand, seven hundred forty-one".